The next commit will use "echo -e". The problem with that is that bash
and sh differ:

- in bash: this results in "a\nb" (a+newline+b)
- in sh: this results in -e a\nb (-e a+newline+b)

The problem is that by default, commands are executed through sh, which
nobody expects. Change to bash, which is likely more aligned with what
people want to use.

After the previous commit, the CI will always do an undeployment step
even if the CI failed. Hence, these XMLs are not necessary anymore. Some
XMLs are updated to do what their "cleanup XML" counterparts did, such
as removing additional images.

Use the previous commit on returning success from each task execution
function, and implement handling of errors in the main loop. Add a
script with which this is visible using Custom_Commands.

The repeatCount property is useless: it would be enough to specify the
same XML multiple times to achieve the same thing.

For reasons I don't understand, the XML option reading and actual test
case execution are at different places in the code. This is problematic,
because what this led to is that options are not passed as function
arguments, but indirectly through class members. This led to a lot of
"indirect code"; it's a total mess

To improve this, move them together, so that parameters can be passed
directly as function arguments later on.

Because we reference the globals, mark them inside
ExecuteActionWithParam(). That is a Python antipattern, but necessary at
this moment. I believe that we can remove the following globals over
time:

- SSH (with new cls_cmd, which we don't need to pass)
- EPC (replaced through a class similar to ue_module, i.e., refer to
  core networks on specific hosts through an ID, instead of a global)
- HTML (should use templating, where individual functions give back a
  dictionary of what they want to print, and a final pass assembles the
  entire HTML file)
- RAN/SCA/PHYSIM/CLUSTER/ldpc (can be replaced with stateless scripts
  build/run eNB/gNB on a specific node)

Update the regex for both sender and receiver data to allow optional
bitrate unit prefixes - accepts also no prefix. Modify the patterns for
lost and total packets to accept negative values (`-?\d+`).

Add some basic unit tests to verify that Iperf/Ping work. Harmonize the
logging by only print in the "main" iperf/ping function, to avoid that
if we test with multiple UEs, the output intermixes. Also, do one common
mkdir before starting multiple pings/iperfs. Finally, harmonize the
paths so that Iperf and Ping log their files in the same place.

Integration: `2024.w38b`

Closes #839

See merge request oai/openairinterface5g!2977

* !2704 nr pdcp: add support for nea1
* !2800 UE improvements
* !2920 Receive SIB19 on nrUE
* !2975 Remove hardcoding of CPU measurements (respect option `-q`)
* !2976 Update latest SIMDE version
* !2957 T: increase max number of args
* !2916 NR UE PUSCH resource mapping optimization
* !2787 CI: increase max number of concurrent workers to 64
* !2974 fhi_72: allow to provide dpdk_mem_size to xran
* !2964 CI: Replacing the UE on Aerial setup
* !2973 CI: remove unused code and files

See e.g., egrep(1) [https://linux.die.net/man/1/egrep]:

> two variant programs egrep and fgrep are available. egrep is the same
> as grep -E. fgrep is the same as grep -F. Direct invocation as either
> egrep or fgrep is deprecated

See also the rationale of the POSIX description of grep
(https://pubs.opengroup.org/onlinepubs/9699919799/utilities/grep.html):

> This grep has been enhanced in an upwards-compatible way to provide
> the exact functionality of the historical egrep and fgrep commands as
> well. It was the clear intention of the standard developers to
> consolidate the three greps into a single command.

Closes: #839

As of now, these seem to be the Jenkinsfiles used on Jenkins

ci-scripts/Jenkinsfile-cluster
ci-scripts/Jenkinsfile-colosseum
ci-scripts/Jenkinsfile-GitLab-Container
ci-scripts/Jenkinsfile-GitLab-COTS-UE-Test
ci-scripts/Jenkinsfile-nrue
ci-scripts/Jenkinsfile-physim-deploy
ci-scripts/Jenkinsfile-push-registry
ci-scripts/Jenkinsfile-tmp-full-ran
ci-scripts/Jenkinsfile-tmp-multi-enb
ci-scripts/Jenkinsfile-tmp-multi-enb-nsa
ci-scripts/Jenkinsfile-tmp-ran

(gather all files in a file, then cat <file> | sort | uniq)

Remove all others.